Re: <E36><M3) More Incremental Bang for the Buck

["Gary Derian" <gderian@xxxxxxxxxxxx>]

Wheels = flywheel?  No way.  All rotational inertia is not equal.  The
flywheel, in first gear, spins about 14 revolutions for every revolution of
the wheels.  Polar moment of inertia is proportional to the square of the
angular velocity, therefore one lb saved at the flywheel is nearly 200 times
more effective than one lb saved at the wheels, in first gear.

Gary Derian <gderian@domain.elided>


> Franklin, one thing to take into account is lightweight wheels, they are
also part of the drivetrain (the rears at least) and you can strip 40
> -60 lbs of rotating mass, this will improve acceleration, it is cheaper
then a flywheel job,
> and you will experence a more responsive handling in the process,
> BMW's come with HEAVY wheels, most people change them for looks, but if
you buy a lightweight set of forged wheels, it is better then changing the
flywheel, and you do not loose drivability, like the lightened flywheel.

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